1 Section of Microbiology, Department of Veterinary Disease Biology, Faculty of Life Sciences, Københavns Universitet2 Production & Health, Department of Large Animal Sciences, Faculty of Life Sciences, Københavns Universitet3 Wageningen University and Research Centre4 Animal Health Service5 Veterinary Clinical Microbiology, Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, Københavns Universitet6 Veterinary and Agrochemical Research Centre7 Section for Production and Health, Department of Large Animal Sciences, Faculty of Health and Medical Sciences, Københavns Universitet8 National Institute for Public Health and the Environment9 Section of Microbiology, Department of Veterinary Disease Biology, Faculty of Life Sciences, Københavns Universitet10 Veterinary Clinical Microbiology, Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, Københavns Universitet11 Veterinary and Agrochemical Research Centre12 Section for Production and Health, Department of Large Animal Sciences, Faculty of Health and Medical Sciences, Københavns Universitet